/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2015 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.iso.channel;

import org.jpos.iso.*;

import java.io.IOException;
import java.net.ServerSocket;

/**
 * ISOChannel implementation - Postilion Channel
 * Send packet len (2 bytes network byte order MSB/LSB) followed by
 * raw data.
 *
 * @author salaman@teknos.com
 * @version Id: PostChannel.java,v 1.0 1999/05/14 19:00:00 may Exp
 * @see ISOMsg
 * @see ISOException
 * @see ISOChannel
 */
public class PostChannel extends BaseChannel {
	/**
	 * Public constructor (used by Class.forName("...").newInstance())
	 */
	public PostChannel() {
		super();
	}

	/**
	 * Construct client ISOChannel
	 *
	 * @param host server TCP Address
	 * @param port server port number
	 * @param p    an ISOPackager
	 * @see ISOPackager
	 */
	public PostChannel(String host, int port, ISOPackager p) {
		super(host, port, p);
	}

	/**
	 * Construct server ISOChannel
	 *
	 * @param p an ISOPackager
	 * @throws IOException
	 * @see ISOPackager
	 */
	public PostChannel(ISOPackager p) throws IOException {
		super(p);
	}

	/**
	 * constructs a server ISOChannel associated with a Server Socket
	 *
	 * @param p            an ISOPackager
	 * @param serverSocket where to accept a connection
	 * @throws IOException
	 * @see ISOPackager
	 */
	public PostChannel(ISOPackager p, ServerSocket serverSocket)
			throws IOException {
		super(p, serverSocket);
	}

	protected void sendMessageLength(int len) throws IOException {
		serverOut.write(len >> 8);
		serverOut.write(len);
	}

	protected int getMessageLength() throws IOException, ISOException {
		byte[] b = new byte[2];
		serverIn.readFully(b, 0, 2);
		return ((int) b[0] & 0xFF) << 8 |
				(int) b[1] & 0xFF;
	}

	/**
	 * * @param header Hex representation of header
	 */
	public void setHeader(String header) {
		super.setHeader(
				ISOUtil.hex2byte(header.getBytes(), 0, header.length() / 2)
		);
	}
}

